<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>icon图标</title>
    <link rel="stylesheet" href="http://cdn.bootcss.com/bootstrap/3.3.4/css/bootstrap.min.css">
</head>
<body>
    <div class="container">
        <span class="glyphicon glyphicon-asterisk" aria-hidden="true"></span>
        <br/>
        <button type="button" class="btn btn-default" aria-label="Left Align">
            <span class="glyphicon glyphicon-menu-up" aria-hidden="true"></span>
        </button>
    </div>
</body>
</html>